The Big Cartoon DataBase reports that Sir Ian McKellen and Andy Serkis, who played the parts of Gandalf and Gollum, respectively, in the Lord of the Rings trilogy will be providing the voices for a frog and rat in an upcoming Aardman Animation/DreamWorks animated feature titled Flushed Away about animals living in the sewers of London. X-Men star Hugh Jackman is also in talks to play the part of “Roddy, the pampered rodent.”